the big stage isn't open on thursday night (well, in past years it wasn't), but there are bands playing in the tents (smaller bands - not headliners, obviously). i really really doubt phish will play twice in a night. they'd play 2 sets, take a long break and then play a third set, and that would be their two shows? no. but then again it's all speculation until the schedule comes out. if i had to bet they'd play Friday night, and Saturday late night.